the options are as below:
=======================
Usage: change_pw [options]

Options:

--all / -a
Change the password for all lists.

--domain=domain
-d domain
Change the password for all lists in the virtual domain `domain'. It
is okay to give multiple -d options.

--listname=listname
-l listname
Change the password only for the named list. It is okay to give
multiple -l options.

--password=newpassword
-p newpassword
Use the supplied plain text password `newpassword' as the new password
for any lists that are being changed (as specified by the -a, -d, and
-l options). If not given, lists will be assigned a randomly
generated new password.

--quiet / -q
Don't notify list owners of the new password. You'll have to have
some other way of letting the list owners know the new password
(presumably out-of-band).

--help / -h
Print this help message and exit.
================================================
that is all !